Function bfgs_complex 

pub fn bfgs_complex<F, G>(
    initial: &Array1<Complex64>,
    objective: F,
    gradient: G,
    config: &BFGSConfig<f64>,
) -> Result<Array1<Complex64>, OptimizationError>
where
    F: Fn(&Array1<Complex64>) -> f64,
    G: Fn(&Array1<Complex64>) -> Array1<Complex64>,

Minimize objective with complex BFGS quasi-Newton updates.

Errors

Returns an error for invalid inputs/configuration or non-finite gradients.